Tape cutting attachment device for adhesive tape rolls



Aug. 21, 1956' RIZZA 2,759,545

TAPE CUTTING ATTACHMENT DEV-ICE FOR ADHESIVE} TAPE ROLLS Filed Aug. 18,1954 I T 3rmentor FRANK E. RIZZA Ci Heme g2 United States Patent 7 TAPECUTTING ATTACHMENT DEVICE FOR ADHESIVE TAPE ROLLS Frank E. Rizza,Milford, Conn.

Application August 18, 1954, Serial No. 450,684

Claims. (Cl. 16448.5)

The present invention relates to a tape cutting attachment device foradhesive tape rolls, and is acontinuationin-part of'my application forDispenser for. Adhesive Tape, Serial No. 295,419, filed June 25, 1952,now Patent. No. 2,699,251.

An object of the invention is toprovidea tape cutting attachment deviceof simple and inexpensive construction, preferably formed ofmolded-plastic material, and whichmay be conveniently attached to thestandard commercial type spool of adhesive tape to provide a support forthe spool about which the latter may be rotated to unwind a'length oftape. It is further proposed to provide such device having a straightcutting edge disposed at one side of the spool tangential to a circleconcentric to and of greater diameter than the spool, to the'end that alength of tape to be severed, after being drawn from the spool byrotating the latter about the attachment device, may be disposedtransversely across the cutting edge sothat it may be effectuallysevered along a line transverse to the length of tape and parallel'tothetransverse strands of the woven cloth base of the tape, thuspermitting a clean severance of the tape without producing ravels.

A further object is to provide a tape. cutting: attachment device whichwill not interfere with the normalengagement and disengagement of thedrumclosure' orcasing usually provided upon the standard commercial typetape spool..

A further object is to provide an attachment whichis adjustable forattachment to spools. of varying widths, thus enabling the sameattachment to be employed with spools containing narrow and wide tapes,aswell as spools containing a plurality of tapes of dii'ierentwidths.

In connection with the use of the attachment with spools containingtapes of different widths,.it is a further object of the invention toprovide an attachment whichmay be interchangeably engaged at eitherside. of the spool, so as to dispose the cutting edge adjacent either ofthe plurality of tapes carried by the spool.

Other objects and advantages of the invention will-become apparent froma considerationof the followingde- I tailed description taken inconnection with the accompanying drawing wherein a satisfactoryembodiment of themvention is shown. However, it is to be understood thatthe invention is not limited to the details disclosed but includes allsuch variations and modifications as fall within the spirit of theinvention and the scopeof the appended claims.

In the drawing:

Fig, 1 is a perspective view of the tape cutting. attachment deviceaccording to the illustrated exemplary embodiment of the invention, thetwo parts thereof being shown in separated relation;

Fig. 2 is a perspective view of a standard commercial type spool of tapehaving the closure drum or casing engaged therewith;

Fig. 3 is a side elevation of the attachment device se- 2,759,545Patented Aug. 21, 1 956 ice cured to aspool of tape with the coveringdrum or casing in place .thereon;

Fig, 4 is a vertical sectional view taken along the line 4-4 of Fig. 3;

Fig. 5 is. a top plan view with the closure drum or casing removed, andshowing the position of the lengthof tape disposed across the cuttingedge and. aboutto be severed, the dotted lines indicating the positionof the hand holdingthe device and the hand holding thelength of tape tobe severed;

Fig. 6 is a sectional view similar to Fig, 4 and showing the attachmentdevice securedto a spool of greater width than the spool illustrated inFig. 4, the particular spool shown having two different width rolls oftape carried thereby; and

Fig. 7 is a fragmentary side elevation of a modified form of i theinvention.

Similar reference characters indicate corresponding parts throughout theseveral figures of the drawing.

Referring to the drawing, the spool of tape to which the. cuttingattachment device of the invention is adapted to-beattached, is of thestandard commercial type. and comprises a-cylindrical hubiti having apairof circular side flanges. 11-11 secured thereon adjacent its, ends,theseflanges being in the form of centrally apertured discs having theirinner peripheral edges flared outwardly as-at 12 and secured within acurled bead 13 at each endof'the hub, the outer peripheral edge of eachof the flangeshaving an outwardly disposed curled bead, 14. The roll oftape 15 is wound about the hub and is nonrotatable thereon by virtue of.the factthat the adhesive side of the. innermost winding of the tape isadhered to the hub. 10. Thus, in order to unwind a length of. tape itis'necessary to rotate the entire spool and this sometimesprovesawkward,in view of the factthatthe spool is being' rotated while held in thehand and is.very; apt to be accidentally dropped. This disadvantage inunwinding the; tape is mentioned at this pointin viewv of the advantageof the present invention in rotatably mounting the Spool upon theattachment device, which latter may befirmly held-in the hand-as thetape. is unwound and the. spool. rotated, as will presently more fullyappear.

A: closure. drum or casing. 16 is detachably engaged aboutthe spool andis providedwith outwardly. disposed curled beads 17.-17 at its edgeswhich, in the engaged position, are disposed slightly outwardly of thebeads..14:of the spool. The. drum is provided upon itsinner. surface at.suitablepointswi-th inwardly pressed bosses or lugs 18, which, in-theengaged position, are-disposed adjacent the inner sides of therespective flanges 114-11. The drum: has a slight. clearance withrespect to the outer periphery of the spool, which, combined with itsslight resilience, permits the bosses 18 to be snappedover theperiphery: of the flange 11 to engage or dis-engage the drum;

The:tape cutting attachment device of the invention comprisesa cuttermember. 19 consisting of a. generally circular disc-like flange portion20 provided centrally with a. cylindrical. hub 21 having a series of.annular axially spaced: grooves 22 formed. upon its outer surface, thishub adapted to be telescopically engaged by a retaining member 23'consisting of a circular flange portion 24 having a; cylindrical hub 25,the inside diameter of. which is such as to be slidably engaged upon thehub 21.. The length. of. the. hub 25. substantially corresponds. to: thelength; ofthe. hub 21. so that in the fully engagedposition, asshowninFig; 4, the. end of. thehub ZS will engage the inner surface ofthe flange 20 and the end of the hub 21 will engage an inwardlyextending annular abutment portion 26 of the flange 24.

The hub 25 is slightly resilient and for this purpose is provided withsuitably spaced longitudinal slots 27,

and between these slots at points adjacent the outer end of the hubthere are provided upon its inner surface a plurality of projectingbosses 28 which are adapted to snap into the annular grooves 22 of thehub 21., the particular groove engaged by these bosses determining theaxial spacing between the flange 20 and the flange 24.

The flange portion 26 is provided with a straight cutting edge 29,preferably of sharp toothed form, extended as a cord between two spacedpoints of the peripheral edge of the flange portion. As shown in themodification in Fig. 7, the cutting edge may be slightly downwardlyoffset to provide shoulders 3ti?t at the ends of the cutting edge, sothat when the tape to be severed is positioned upon the cutting edge itwill be prevented from slipping off of the cutting edge in the eventthat it is not held with sufficient firmness.

In operation, the closure drum 16 is removed, as shown in Fig. 5, and alength of tape to be severed is drawn from the roll by gripping theflange member 20 so that the spool is free to rotate about the hub(formed by the telescoping hub portions 21 and 25), as the tape isunwound, the free rotation of the spool permitting the tape to be pulledoff of the roll at a point in proximity to the cutting edge.

The thumb of the hand holding the tape spool is pressed against the tapeat the inner side of the cutting edge so that it may be firmly heldagainst the inner side of the flange 20, and thereupon the length oftape gripped by the other hand may be readily severed across the cuttingedge. By arranging the direction of winding of the tape in relation tothe cutting edge such that the non-sticky side will engage the cuttingedge, the adhesive upon the tape is prevented from packing into thecutting edge teeth and also the end of the tape at the inner side of thecutting edge is free to be readily reengaged about the tape roll.

The cutter member 19 may be disposed at either side of the tape spool,as desired, for the more convenient operation of the device by right orleft handed users.

In Fig. 6 there is illustrated a tape spool of suflicient width toaccommodate two tape rolls 15-15 of diflerent width, the telescoping hubportions 21 and 25 of the attachment device being extended to fit thewide tape spool.

What is claimed is:

1. In a cutting device for tape rolls, a hub for rotatably receiving atape roll, a flange part connected to an end of said hub and extendingradially for disposition at one side of said tape roll and having aradially outwardly disposed tape cutting sharpened edge extending alonga straight line tangential to a circle concentric to said hub, a drawnlength of tape from said roll adapted to be placed over said cuttingedge with a straight transverse line of said tape in engagementtherewith for severing along said straight transverse line.

2. The invention as defined in claim 1, wherein said cutting edge issubstantially in the central plane of said flange part.

3. The invention as defined in claim 1, wherein said flange part is ofgenerally circular form with said cutting edge extending along astraight line cord between spaced points of its periphery, the peripheryof said flange part extending from one end of said cutting edge aboutsaid flange to the other end of said cutting edge being a continuouslycircumferential edge free of cutting sharpness.

4. The invention as defined in claim 1, further characterized byabutment shoulders at each end of said cutting edge.

5. The invention as defined in claim 1, further characterized byretaining means connected to the other end of said hub to retain saidtape roll thereon.

6. In a cutting device for tape rolls, a hub for rotatably receiving atape roll and comprising a pair of telescoping hub parts, a flange partconnected to the outer end of one of said hub parts and extendingradially for disposition at one side of said tape roll, and a tape rollretaining flange part connected to the outer end of the other of saidhub parts, said first flange part having a radially outwardly disposedtape cutting sharpened edge extending along a straight line tangentialto a circle concentric to said hub, a drawn length of tape from saidroll adapted to be placed over said cutting edge with a straighttransverse line of said tape in engagement therewith for severing alongsaid straight transverse line.

7. The invention as defined in claim 6, further characterized byreleasable means for securing said telescoping hub parts in. a pluralityof axially adjusted positions.

8. In a tape cutting attachment device for a tape dispenser of the typehaving a tubular hub and a pair of parallel flanges rigidly joined tothe respective ends thereof, a hub for rotatably engaging within thetubular hub of said dispenser, a flange part connected to an end of saidhub and extending radially for disposition at one side of one of saidparallel flanges, and having a radially outwardly disposed tape cuttingsharpened edge extending along a straight line tangential to a circleconcentric to said hub, a drawn length of tape from said roll adapted tobe placed over said cutting edge with a straight transverse line of saidtape in engagement therewith for severing along said straight transverseline.

9. In a tape cutting attachment device for a tape dispenser of the typehaving a tubular hub, a roll of adhesive tape non-rotatably mounted onsaid tubular hub, and a pair of parallel flanges rigidly joined to therespective ends of said tubular hub, a hub for rotatably engaging withinthe tubular hub of said dispenser and comprising a pair of telescopingparts, flanges respectively connected to the outer ends of said hubparts, and extending radially for disposition at one side of one of saidflanges of said dispenser, at least one of the said flanges having aradially outwardly disposed tape cutting sharpened edge extending alonga straight line tangential to a circle concentric to said hub, a drawnlength of tape from the said roll adapted to be placed over said cuttingedge with a straight transverse line of said tape in engagementtherewith for severing along said straight transverse line.

10. In a tape cutting attachment device for a tape dispenser of the typehaving a tubular hub, a pair of rolls of adhesive tape non-rotatablymounted on said tubular hub, and a pair of parallel flanges rigidlyjoined to the respective ends of said tubular hub, one of said taperolls being adjacent each of the said flanges, a hub for rotatablyengaging within the tubular hub of said dispenser and comprising a pairof telescoping parts, flanges connected to the outer ends of the saidhub parts and extending radially for disposition at one side of each ofthe said parallel flanges of said dispenser, at least one of the saidflange having a radially outwardly disposed tape cutting sharpened edgeextending along a straight line tangential to a circle concentric tosaid hub, a drawn length of tape from the said roll adjacent said flangeadapted to be placed over said cutting edge with a straight transverseline of said tape in engagement therewith for severing along saidstraight transverse line.

References Cited in the file of this patent UNITED STATES PATENTS1,431,674 MacGill Oct. 10, 1922 2,082,546 Machate et al June 1, 19372,132,950 Green Oct. 11, 1938

